I looked at the IUCN Red List updates and many familiar zoo animals became threatened species in the recent years.
For example, pygmy marmoset is split into two species, both are vulnerable. Golden-bellied mangabey is now endangered (phase-out species in european zoos).
Grey‐cheeked mangabey...
black necked crane
conservation
conservation breeding
endangered species
grusjaponensisgrus nigricollis
iucn red list
red crowned crane
red list
threatened species
upgraded